Passive radiator



FIG. 1 is a top perspective view of a passive radiator of the present invention;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a first side view thereof;

FIG. 5 is a second side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a rear view thereof; and,

FIG. 9 is a cross-section view taken along the line of 9—9 of FIG. 3. 

I claim the ornamental design for a passive radiator, as shown and described. 